Abstract
Orientational elastic deformations in a magnetic field were investigated in the nematic phase of polyphenylterephthaloyl-bis-(4-oxybiphenyl-4′-carbonyl), polylterephthaloyl-bis-(4-oxybiphenyl-3′-carbonyl), and their low molecular weight analogues. Temperature dependences of birefringence Δn were obtained and used to evaluate the degree of orientational order S. The splay and bend elasticiy constants, K1and K3, were determined. The elongation of the rigid mesogenic core in polymer molecules leads to an increase in the K3/K1 ratio, just as in the case of low molecular weight nematics. No effect of molecular weight on the values of Δn and Ki was detected.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
